ADA COUNTY HIGHWAY DISTRICT
3775 Adams Street
Garden City, Idaho 83714
208.387.6100
www.achdidaho.org
Standard Special Provisions
June 2011
These Standard Special Provisions (SSP) cover those construction and bid items not addressed by the
currently adopted version of the Idaho Standards for Public Works Construction (ISPWC). These
provisions are to be used whenever any of these individual items are listed in any ACHD bid proposal
document, unless otherwise approved in writing by authorized ACHD staff.
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Table of Contents
1.
SSP 02020 Gravel Repair ........................................................................................................................... 5
2.
SSP 06007 Abandon Existing Domestic Well ............................................................................................ 5
3.
SSP 06012 Fuel Escalation Clause ............................................................................................................. 6
4.
SSP 06013 Stormwater Management Plan Preparation & Approval ........................................................ 7
5.
SSP 06017 Conflict Manhole ..................................................................................................................... 9
6.
SSP 06018 Install New Domestic Water Well ........................................................................................... 9
7.
SSP 06020 Underground Stormwater Chamber .................................................................................... 10
8.
SSP 06021 Oil/Water Skimmer (SNOUT) ................................................................................................ 10
9.
SSP 07005 Extruded Cement Concrete Curb .......................................................................................... 11
10.
SSP 07009 Median Curb –ITD Profile 6 ................................................................................................... 11
11.
SSP 07013 Colored & Patterned Concrete .............................................................................................. 11
12.
SSP 07014 Detectable Warning Devices – New Ramps .......................................................................... 12
13.
SSP 07015 Detectable Warning Devices - Retrofit.................................................................................. 13
14.
SSP 08103 Stress Absorbing Fabric Interlayer – Asphalt Overlay ........................................................... 13
15.
SSP 08115 Rotomill ................................................................................................................................. 15
16.
SSP 08120 Asphalt Repair – Arterial & Collector .................................................................................... 16
17.
SSP 08125 Asphalt Repair - Other ........................................................................................................... 17
18.
SSP 08133 Scrub Coat ............................................................................................................................. 17
19.
SSP 09001 Sediment Box ........................................................................................................................ 18
20.
SSP 09011 Orchard Valve ....................................................................................................................... 19
21.
SSP 11001 Temporary Traffic Signal ....................................................................................................... 19
22.
SSP 11002 Portable Changeable Message Sign ...................................................................................... 20
23.
SSP 11008 Portable Flood Lights ............................................................................................................. 22
24.
SSP 11101 2" Diameter Schedule 40 PVC Signal Conduit ...................................................................... 22
25.
SSP 11228 Signal Loop Installation – Preformed .................................................................................... 23
26.
SSP 11230 Information Sign .................................................................................................................... 23
27.
SSP 11235 Video Detection Camera ....................................................................................................... 23
28.
SSP 11450 Temporary Pavement Markings ............................................................................................ 24
29.
SSP 20003 Temporary Construction Fencing .......................................................................................... 25
30.
SSP 20006 Raised Channelization ........................................................................................................... 26
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31.
SSP 20009 Remove & Reset Fence.......................................................................................................... 26
32.
SSP 20020 Install Removable Bollards .................................................................................................... 27
33.
SSP 20105.01A Metal Guardrail Terminal Type 1A ................................................................................. 27
34.
SSP 20105.03 Metal Guardrail Terminal Type 3 ..................................................................................... 27
35.
SSP 20105.07 Metal Guardrail Terminal Type 7 ..................................................................................... 28
36.
SSP 20105.08 Metal Guardrail Terminal Type 8 ..................................................................................... 28
37.
SSP 20105.010 Metal Guardrail Terminal Type 10 ................................................................................. 28
38.
SSP 20105.011 Metal Guardrail Terminal Type 11 ................................................................................. 29
39.
SSP 20105.A W Beam Guardrail for Minor Structures (One Post Missing Option)................................. 29
40.
SSP 20105.B W Beam Guardrail for Minor Structures (Two Posts Missing Option) ............................... 30
41.
SSP 20109 Pedestrian Bridge Railing ...................................................................................................... 30
42.
SSP 20113 Block Retaining Wall .............................................................................................................. 31
43.
SSP 20114 Mechanically Stabilized Earth (MSE) Retaining Wall ............................................................. 32
44.
SSP 25020 Erosion Control Mat .............................................................................................................. 37
45.
SSP 25030 Demolish & Remove Existing Building................................................................................... 38
46.
SSP 25049 Sandy Topsoil ........................................................................................................................ 39
47.
SSP 25050 4” Topsoil............................................................................................................................... 39
48.
SSP 25060 Property Owner Meeting ...................................................................................................... 40
49.
SSP 25062 Remove Underground Septic Tank........................................................................................ 40
50.
SSP 25080 Remove & Reset Mailbox ...................................................................................................... 41
51.
SSP 25115 Temporary Coffer Dam.......................................................................................................... 41
52.
SSP 29050 Temporary Soil Stabilization ................................................................................................. 42
53.
SSP 29060 Hydroseeding ........................................................................................................................ 43
54.
SSP 29065 Sod Repair ............................................................................................................................ 44
55.
SSP 29090 Trim Tree ............................................................................................................................... 45
56.
SSP 29093 Remove Tree 6”+ ................................................................................................................... 46
57.
SSP 29101 Remove & Reset Sprinkler System ........................................................................................ 46
58.
SSP 29110 Groundwater Observation Well ............................................................................................ 47
59.
SSP 29800 Abandon Existing Septic System ........................................................................................... 48
60.
SSP 70015 Concrete Canal Lining ............................................................................................................ 48
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1.
SSP 02020
Gravel Repair
Description: This item shall include all costs associated with the repair of existing gravel driveway
accesses abutting the project to match the grades of new back of sidewalk and existing gravel.
Locations for repairs are shown on the plans or as directed in the field by the Engineer.
Materials & Workmanship: This item shall include excavation and/or borrow, construction of
necessary embankment, labor, equipment, and materials necessary to complete placement of a 6inch thickness of ¾” aggregate base course, on a compacted subgrade. Materials shall meet the
requirements of Section 802.
Measurement and Payment:
Payment for this item will be made under:
SSP 02020
2.
SSP 06007
Gravel Repair ................................................................................. Per Square Yard
Abandon Existing Domestic Well
Description: This item shall include all costs required to abandon an existing potable water well in
accordance with the requirements of the Idaho Department of Water Resources.
Materials & Workmanship: All existing wells designated to be abandoned shall be permanently
abandoned in accordance with IDAPA 37.03.09.025.12 Well Construction Standards Rules of Idaho
Administrative Code. At a minimum all existing pumping equipment shall be removed, the well
casing filled with bentonite granules as required to stop the upward or downward movement of
water. The well casing shall be cut off 2 feet below subgrade or at a level that does not interfere
with the new roadway improvements. The contractor shall prepare a written plan of the method
he proposes to use to abandon the well and shall submit the plan to ACHD and the Idaho
Department of Water Resources for approval prior to construction. The Contractor shall submit
any forms and pay for any fees as required by the Idaho Department of Water Resources to
abandon the well.
Measurement and Payment: Abandon Existing Well will be measured per each and shall include
all labor, equipment and material necessary for the completion of the bid item. The accepted
quantity of Abandon Existing Well will be paid at the contract unit price for the item listed below.
Payment for this item will be made under:
SSP 06007
Abandon Existing Domestic Well .................................................. Per Each
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3.
SSP 06012
Fuel Escalation Clause
A. Description. This item consists of adjustment to compensation due the Contractor based on
certain market fuel price changes during the life of the project. Fuel Price Adjustments will be
applied to partial and final payments for contract items categorized in Section B, as a payment
to the Contractor or a credit to the Owner. Work performed by the Contractor at its own
expense will not be eligible for fuel price adjustments.
B. Categories of Bid Items. The following fuel usage rates for the applicable items will be used to
determine fuel price adjustments:
Item Description Categories
Excavation including topsoil
Excavation – Rock (must be specifically identified as
such in contract)
Borrow
Base
Surface treatments including sealcoats
Concrete Pavements
Concrete (all concrete paid by the CY )
Concrete – Sidewalk
Concrete – Curb & Gutter
Plantmix pavements
Piledriving
Rotomilling / Pulverizing / Mixing
Pipe, guardrail
MSE Retaining Wall
Fuel Usage Rate English
Gal/Unit
0.29 CY
0.39 CY
0.29 CY
0.63 Ton
0.02 SY; 1.47 Ton
0.03 SY per inch of depth
0.98 CY
0.12 SY
0.05 LF
2.6 Ton
0.12 gal per ft
0.02 SY per inch of depth
19.0 / $1000
19.0 / $1000
C. Fuel Index. A current fuel index (CFI) will be established by the Owner for each month. The
following web page will be used to determine the index values:
http://itd.idaho.gov/highways/Construction/construction.htm
As found at this website, the CFI will be the price of number two (No. 2) diesel fuel, low sulfur
clear, as reported in the Idaho Transportation Department (ITD) Fuel Index for Boise. The ITD
Fuel Index posting dates are the first Monday of the month. The base fuel index (BFI) will be the
CFI for the month the contract was awarded.
D. Computing the Fuel Price Adjustment. If the ratio of CFI/BFI falls between 0.80 and 1.20
inclusive, no fuel adjustment will be made for that pay estimate. If the ratio is less than 0.80 a
credit to the Owner will be computed. If the ratio is greater than 1.20, additional payment to the
Contractor will be computed. Credits and payments are computed as follows:
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i.
ii.
iii.
iv.
The quantity of work done for each pay estimate for the contract items identified in Section
B is identified from the pay estimate.
The gallons of fuel used for that pay estimate are computed for each of the contract items
identified in Section B by applying the unit fuel usage factors categorized in Section B to the
quantity of work performed.
The total gallons (Q) of fuel used for that pay estimate will be summed for the applicable
contract items, as determined, in Section B.
The Fuel Price Adjustment credit or payment is computed from the following formulas:
Contractor Payment: FA = ((CFI/BFI)-1.20) x Q x BFI
District Credit: FA = ((CFI/BFI)-0.80) x Q x BFI
Where:
FA = Fuel Price Adjustment
CFI = Current Fuel Index
BFI = Base Fuel Index
Q = Total gallons of fuel used for the pay estimate
E. Basis of Payment. A Fuel Price Adjustment payment to the Contractor will be made as a dollar
amount for each pay estimate. A Fuel Price Adjustment credit to the Owner will be deducted as
a dollar amount for each pay estimate from any sums due to the Contractor.
F. Final Fuel Price Adjustment. Upon completion of the work under the contract, any difference
between the estimated quantities and the final quantities will be determined. An average CFI,
calculated from the CFI for all the pay estimates that the fuel price adjustment was applied, is
used in accordance with the procedure set forth in Section D. A final fuel price adjustment will
be made on the final estimate.
Payment for this item will be made under:
SSP 06012
4.
SSP 06013
Fuel Escalation Clause ................................................................... Per Lump Sum
Stormwater Management Plan Preparation & Approval
Description: This item shall consist of all work associated with contractor plan preparation and
approvals to meet the requirements of the National Pollutant Discharge Elimination System
(NPDES) Construction General Permit (CGP) and/or the Construction Site Discharge Control (CSDC)
Program as required. The contractor is considered an operator having day-to-day control as
defined in the EPA CGP; therefore, the contractor is a co-permittee with ACHD in the
implementation of the CGP requirements. A Stormwater Pollution Prevention Plan (SWPPP) will
be accepted by ACHD in lieu of the CSDC Plan provided that the SWPPP meets the CSDC Program
requirements listed in 8305 and 8306 of the ACHD Policy Manual.
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Workmanship: The contractor is responsible for the completion, submittal, and implementation of
the ACHD provided SWPPP drawing and narrative, filing of the Notice of Intent (NOI), and filing of
the Notice of Termination (NOT). The CGP and instructions for completing the NOI and NOT forms
can be found on the EPA website: http://www.epa.gov/npdes/stormwater/cgp., The SWPPP shall
have been prepared and submitted to ACHD for acceptance prior to the filing of the NOI. Prior to
filing the NOT, the conditions listed in Part 5 of the CGP shall be met.
Once a SWPPP has been prepared, the Contractor and ACHD shall both submit an electronic NOI
on the website listed above. There is a seven calendar day wait after the acknowledgement of
receipt has been posted on the EPA website for the SWPPP to be considered approved and
construction allowed to commence.
Prior to starting construction, the ACHD accepted SWPPP/CSDC Plan must be implemented. No
Construction Activity or Land Disturbing Activity will be allowed to commence until the Contractor
has fully implemented the accepted SWPPP/CSDC Plan as required by the District and set forth in
the ACHD Policy Manual.
Additionally the contractor is responsible for installing, maintaining, and removing all Best
Management Practices (BMPs) and for all documentation required to keep the SWPPP current.
For compliance with the District’s CSDC Program, the SWPPP/CSDC Plan should address all
potential pollutants outlined in the ACHD Policy Manual.
A Rainfall Erosivity Waiver is available and defined in Appendix D, Part A of the CGP. If the waiver
is utilized, and the conditions on which the waiver is based change, the contractor is responsible
for updating the waiver and/or development and implementation of a SWPPP.
BMPs for controlling pollutant transport from the construction site can be found in a number of
publications including, but not limited to:
a) Idaho Department of Environmental Quality, Catalog of Storm Water Best
Management Practices for Idaho Cities and Counties: Phone: (208) 373-0502 or on
the internet: http://www.deq.state.id.us/water/stormwater_catalog/index.asp
b) United States Environmental Protection Agency – Region 10: (800) 424-4372 or on
the internet at: www.epa.gov/r10earth/stormwater.htm
c) Boise City Planning and Development Services: phone: (208) 395-7818
d) Idaho Transportation Department, Erosion and Sediment Control Manual, phone:
(208) 334-8476
Measurement and Payment: Payment for work items to implement the SWPPP or CSDC shall be per
other specific bid items noted in this contract.
Payment for this plan preparation and approval item will be made under:
SSP 06013
Stormwater Management Plan Preparation & Approval .............. Per Lump Sum
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5.
SSP 06017
Conflict Manhole
Description: This item shall consist of constructing either a pre-cast or cast-in-place conflict
manhole at the location and grades detailed in the plans and detail sheets.
Materials: Materials for the Conflict Manhole shall conform to the requirements of the Idaho
Standards for Public Works Construction (ISPWC) and all approved ACHD Supplemental
Specifications
Workmanship: Conflict Manhole construction shall conform to the requirements of the Idaho
Standards for Public Works Construction (ISPWC) and all approved ACHD Supplemental
Specifications, Division 602 - Storm Drain Inlets, Catch Basins, Manholes and Gravity Irrigation
Structures. The contractor shall adjust, raise or lower, the manhole frame, rings, and covers as
necessary to match the finished surface. Work shall include making necessary pipe connections,
and support the existing irrigation pipe during construction.
Measurement and Payment: Conflict Manhole shall be measured per each manhole, complete in
place, which includes all labor and materials necessary for a complete installation, including
furnishing the manhole frame, cover and adjustment rings.
Excavation, Structure Excavation, existing pipe support, bedding and backfill materials, and
compacting backfill will not be measured or paid for separately, and is included in the unit bid
price for the Conflict Manhole.
Payment for this item will be made under:
SSP 06017
6.
SSP 06018
Conflict Manhole ............................................................................ Per Each
Install New Domestic Water Well
Description: This item shall include all work and costs associated with installation of a new
domestic water well as shown on the plans.
Materials & Workmanship: The new domestic water well shall be completed within the first 45
days of the construction schedule, unless otherwise approved by the Engineer. This work shall be
coordinated so that Bid Item 504.4.1.D.1 Sewer Service Connection to Main – Size 4 Inch is
completed at the same time.
Contractor will be required to reconnect the residence to the new well reusing the existing well
pump and appurtances.
Contractor is required to contact property owner 14 days in advance to coordinate the timing for
the installation of the new domestic water well.
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Contractor is to obtain any permits necessary for the installation of a New Domestic Water Well.
Also included in this item is the removal of all drilling waste and restoration of the existing area.
Measurement and Payment: Install New Domestic Water Well will be measured per each and
shall include all labor, equipment and material necessary for the completion of the bid item. The
accepted quantity of Install New Domestic Water Well will be paid at the contract unit price for
the item listed below.
Payment for this item will be made under:
SSP 06018
7.
SSP 06020
Install New Domestic Water Well .................................................. Per Each
Underground Stormwater Chamber
Description: This item shall consist of constructing an underground stormwater chamber at the
location and grades detailed in the plans and detail sheets.
Materials: Underground stormwater chambers shall be Storm Tech SC-740 or approved equal.
Workmanship: Drainage beds shall be constructed per ISPWC Standard Drawing ACHD-646 and per
Manufacturer’s recommendations. Construction of drainage beds must include specification
approved materials for bedding, geotextile fabrics, and backfill.
Measurement and Payment: Per linear foot as measured per individual row of chambers, including
all costs associated with providing and installing Underground Stormwater Chamber as shown on
the project plans including, but limited to excavation, drain rock and geotextile fabric.
Payment for this item will be made under:
SP 06020
8.
SSP 06021
Underground Stormwater Chamber……………………………………………Per Linear Foot
Oil/Water Skimmer (SNOUT)
Description: This item shall consist of installing an oil/water skimmer (snout) at the location and
grades detailed in the plans and detail sheets.
Materials: Oil/Water Skimmer to be a nyloplastic snout or approved equal designed to fit manhole
structure.
Workmanship: Construction shall conform to details as shown in ACHD Standard Drawing ACHD646 and manufacturers installation guidelines.
Measurement and Payment: This item shall be measured per each and shall include all costs
associated with providing and installing Oil/Water Skimmer as shown on the project plans.
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Payment for this item will be made under:
SSP 06021
9.
SSP 07005
Oil/Water Skimmer (SNOUT)…………………………………………………………….Per Each
Extruded Cement Concrete Curb
Description: This item shall consist of constructing an extruded cement concrete curb at the
location detailed in the plans and detail sheets.
Materials & Workmanship: The curb shall conform to the details shown on the plans and in
conformance with Division 700 of the ISPWC. Concrete shall be Class 3000.
Extruded cement concrete curb shall be placed, shaped, and compacted true to line and grade.
The pavement shall be dry and cleaned of loose and deleterious material prior to curb placement.
Joints in the curb shall be cut vertically and spaced at 10-foot intervals.
Measurement and Payment:
Payment for this item will be made under:
SSP 07005
10. SSP 07009
Extruded Cement Concrete Curb .................................................... Per Linear Foot
Median Curb –ITD Profile 6
Description: This item shall include all costs associated with constructing a new concrete median
curb, as shown on the plans or as directed by the engineer.
Materials & Workmanship: Raised channelization shall be constructed per Division 700 - Concrete
of the ISPWC Specifications and in accordance with ITD Standard Drawing H-1. Concrete shall be
Class 3000.
Measurement and Payment:
Payment for this item will be made under:
SSP 07009
11. SSP 07013
Median Curb –ITD Profile 6............................................................ Per Linear Foot
Colored & Patterned Concrete
Description: This item shall consist of constructing colored and patterned concrete at the location
and grades detailed in the plans and detail sheets.
Materials: Concrete shall be Class 4000B and shall meet all applicable requirements of Division
700 of the ISPWC. Color Hardener or approved equal shall be Regular Grade. The Contractor
shall submit color and pattern samples for approval prior to construction.
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Workmanship: The pattern shall be Stacked Bond Brick or approved equal. Color Hardener, or
approved equal, shall be added to the transit mixer on site. Color shall be integral in the concrete
mix. When the concrete is still in the plastic stage of set, imprinting tools shall be applied to make
the approved patterned surface. The pattern shall be formed with 3/8-inch maximum depth
grooves and shall be ungrouted. The concrete shall be cured and sealed in accordance with the
manufacturer's recommendations.
Measurement and Payment: All costs associated with construction of the colored and patterned
sidewalk, including concrete, color hardener, imprinting tools, curing, and sealing, shall be
included in the unit price bid for this item.
Payment for this item will be made under:
SSP 07013
12. SSP 07014
Colored & Patterned Concrete ...................................................... Per Square Yard
Detectable Warning Devices – New Ramps
Description: This item consists of furnishing and installing composite wet set replaceable tactile
warning surface (TWS) units, in an in-line truncated dome pattern, embedded in all curb ramps at
the locations shown in the Plans and according to ISPWC Standard Drawing SD-712.
Materials: TWS units shall be manufactured using a matte finish exterior grade homogenous glass
and carbon reinforced polyester based SMC composite material as manufactured by ADA
Solutions, Inc. of Chelmsford, MA (Phone: 800-372-0519, website: www.adatile.com) or approved
equal.
Color shall contrast visually with adjacent walking surfaces, either light-on-dark, or dark-on-light.
Methods for construction and coloration must be approved by ACHD prior to construction.
Workmanship: TWS product shall be installed per manufacturer’s instruction. To the maximum
extent possible, the TWS units shall be oriented such that the rows of in-line truncated domes are
parallel with the direction of the ramp. The TWS unit shall be located so that the edge nearest the
curb line is 6" minimum and 8" maximum from the curb line. The TWS units shall be tamped or
vibrated into the fresh concrete to ensure that there are no voids or air pockets, and the field level
of the TWS unit is flush to the adjacent concrete surface. Upon curing (allow 24 to 48 hours)
remove protective plastic covering. Protect TWS unit against damage during the construction
period.
Measurement and Payment: Detectable Warning Devices shall be measured per each and shall
include all labor, materials and equipment necessary for installation. Payment for furnishing and
placement of crushed aggregate and concrete shall be paid for separately as indicated on the plan
drawings and in these special provisions.
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Payment for this item will be made under:
SSP 07014
13. SSP 07015
Detectable Warning Devices – New Ramps .................................. Per Each
Detectable Warning Devices - Retrofit
Description: This item consists of furnishing and installing tactile warning surface (TWS) units, in an
in-line truncated dome pattern, to existing curb ramps at the locations shown in the Plans and
according to ISPWC Standard Drawing SD-712.
Materials: TWS units shall be manufactured using a matte finish exterior grade homogenous glass
and carbon reinforced polyester based SMC composite material as manufactured by ADA
Solutions, Inc. of Chelmsford, MA (Phone: 800-372-0519, website: www.adatile.com) or approved
equal.
Color shall contrast visually with adjacent walking surfaces, either light-on-dark, or dark-on-light.
Methods for construction and coloration must be approved by Owner prior to construction.
Workmanship: TWS product shall be installed per manufacturer’s instruction. To the maximum
extent possible, the TWS units shall be oriented such that the rows of in-line truncated domes are
parallel with the direction of the ramp. The TWS unit shall be located so that the edge nearest the
curb line is 6" minimum and 8" maximum from the curb line. The TWS unit shall be flush to the
adjacent concrete surface. Upon curing (allow 24 to 48 hours) remove protective plastic covering.
Protect TWS unit against damage during the construction period.
Measurement and Payment: Detectable Warning Devices shall be measured per each and shall
include all labor, materials and equipment necessary for installation. Payment for this item will be
made under:
Payment for this item will be made under:
SSP 07015 Detectable Warning Devices – Retrofit .................................................. Per Each
14. SSP 08103
Stress Absorbing Fabric Interlayer – Asphalt Overlay
Description: This item shall consist of placing a stress absorbing fabric interlayer and underlying
asphalt cement material at the location detailed in the plans and detail sheets or as directed by
the Engineer.
Materials: The stress absorbing fabric interlayer shall meet the following specifications:
a) The fabric shall be constructed of long-chain synthetic polymers composed of at least 85
percent polyolephins, polyesters, and polyamides by weight, shall be resistant to chemical
attack, mildew, and rot
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b)
c)
d)
e)
Tensile strength either direction, minimum (ASTM D-4632 & D-1682) 80 lbs.
Elongation at break either direction, minimum (ASTM D-4632 & D-1682) 50%
Weight oz/SY (ASTM D-2646) 4.0 (+/-0.5)
Asphalt retention by fabric, minimum residual 0.20 gal/SY
The asphalt retention of the fabric will be determined by weighing the fabric and then submerging
it in a layer of asphaltic cement. The fabric and asphalt will then be hung vertically in an oven at
140o F (60o C) for 24-hours followed by 6-hours at 170o F, (77o C), to allow all excess (nonabsorbed) asphalt to drain off. The saturated specimen will then be weighed and the net weight of
asphalt determined. The weight, divided by the original fabric weight, will yield the measure of
asphalt retention per unit of fabric weight.
The asphalt cement to be applied to the pavement surface under the stress absorbing fabric
interlayer shall be paving grade asphalt for this region (originally called AC-10 asphalt cement)
conforming to the requirements of ISPWC subsection 805 - Asphalt Materials.
Workmanship: The ambient air temperature and the underlying pavement temperature shall be a
minimum of 50o F and rising before fabric placement may begin. The wind conditions shall be such
that, in the Engineer's opinion, satisfactory placement of the fabric can be achieved.
Distributor equipment shall include a tachometer, pressure gauges, volume measuring devices
and a thermometer for reading temperatures of tank contents.
The hot asphalt cement shall be applied at a uniform rate of 0.22 GAL/SY (+/- 0.02 GAL/SY) within
a temperature range of 290o F to 325o F. The distributor shall have been certified as to its rate of
delivery within the last 6 months; the Contractor shall be required to provide proof of this
certification.
The width of the asphalt cement application shall be the fabric width plus 4 inches. The asphalt
cement shall be applied no further in advance than the distance that the Contractor can maintain
free of traffic.
Fabric placement equipment shall be mechanized, capable of handling full rolls of material, and
shall be capable of laying the fabric without excessive wrinkles and/or folds. Miscellaneous
equipment such as brooms and knives shall be used as required to ensure proper fabric
placement. The mechanized equipment used to place the fabric is subject to approval by the
Engineer.
The fabric shall be placed on the asphalt cement with a minimum of wrinkles while the asphalt is
hot enough for the fabric to adhere. If the fabric folds or wrinkles 1-inch in height or greater exist,
the fabric will be slit and allowed to lay flat. Brooming may be required to maximize fabric contact
with the pavement surface.
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The fabric shall overlap 2 to 6 inches at all joints. No joints shall be lapped with more than two
layers of fabric. Transverse joints shall be shingled in the direction of the paving operation to
prevent edge pick-up by the paver.
The maximum amount of fabric that may be placed ahead of the paving operation without the
Engineer's prior approval shall be 1300 lineal feet.
Any fabric that is damaged after placement shall be removed and replaced by the Contractor at his
expense. The replacement process shall include fresh asphalt cement if the asphalt cement is no
longer hot enough for the fabric to adhere.
The paving operation shall closely follow fabric placement and no more fabric shall be placed than
can be covered by new pavement that working day. In the event that asphalt bleeds through the
fabric before the new pavement mat is placed, excess asphalt shall be blotted by spreading plant
mix material on those areas so affected.
Traffic of all types shall be kept off the fabric until the pavement is placed, except when it is
absolutely necessary for material hauling equipment and/or pilot cars to travel on the fabric. In
such cases, the speed of all hauling equipment and/or vehicles shall not exceed 10 miles per hour.
Measurement and Payment: The pay quantity of stress absorbing fabric interlayer shall be by the
number of square yards, complete in-place. No quantity will be included for materials used for
repair of tears or for material used in overlaps.
The unit price bid for this item shall include the cost of furnishing all labor, equipment and
materials (including asphalt cement) necessary to complete the work according to the plans and
specifications.
Payment for this item shall be made under:
SSP 08103
15. SSP 08115
Stress Absorbing Fabric Interlayer-asphalt overlay ....................... Per Square Yard
Rotomill
Description: This item consists of furnishing all labor, materials and equipment necessary to mill
and remove the existing asphalt pavement as shown on the plans or as directed by ACHD.
Materials: The equipment for rotomilling the pavement surface shall be a power operated selfpropelled planing machine or grinder capable of removing, in one pass, a thickness of asphalt
pavement necessary to provide the desired profile and cross slope. The planed surface shall
provide a smooth surface, free from gouges greater than 3/8-inch in depth. The equipment shall
be self-propelled with sufficient power, traction and stability (rigid suspension, non-pneumatic
tired) to maintain accurate depth of cut and slope. The equipment shall be capable of accurately
and automatically establishing profile grades along each edge of the machine (within +/- 1/8-inch)
Ada County Highway District | Standard Special Provisions
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by referencing from existing pavement by means of a ski or matching shoe unless otherwise
directed by the Engineer. The rotomill shall be equipped with a floating mold board cutting device
behind the cutting mandrel. The mold board shall have an infinitely variable down pressure from
0-2000 psi and shall be equipped with means to control dust and other particulate matter created
by the cutting action.
Workmanship: The Engineer may direct the Contractor to modify the rotomilling operation or
equipment to protect the existing roadway from damage caused by rotomilling activity. The
modifications shall include, but shall not be limited to, equipment track velocity, cutting drum
revolutions per minute and total depth of cut by the rotomilling equipment. The modifications
directed by the Engineer shall be considered incidental to the bid, and no additional payment shall
be made therefore.
If the Contractor is unable to remove all of the existing pavement adjacent to curbs, water valves,
gas valves, traffic control boxes, manholes, intersections or any other item not specifically
identified herein, with the rotomilling equipment, he shall remove the remaining pavement by
another mechanical process approved by the Engineer.
After completion of the rotomilling operation, and prior to allowing traffic to pass though the
project site, the surface shall be broomed and any excess material removed from the project site.
Measurement and Payment: Rotomill areas will be measured per square yard of surface area
rotomilled and shall include all labor, equipment and material necessary for the completion of the
bid item. Brooming, loading, hauling, and disposal shall be considered as incidental and no
separate payment will be made. Areas to be removed under another process (Along valves,
manholes, etc.) shall be paid at the unit price for Rotomill.
Payment for this item will be made under:
SSP 08115
16. SSP 08120
Rotomill .................................................................................... Per Square Yard
Asphalt Repair – Arterial & Collector
Description: This item shall include all work and costs associated with the repair of the existing
asphalt roadway to match the grade of curbs, sidewalks, driveway approaches and existing
asphalt.
Materials: This item shall include placement of a 6” (inch) thickness of 3/4” (inch) aggregate base
course in accordance with Section 802 – Crushed Aggregates of the ISPWC, on a compacted subgrade, and a 3” (inch) thickness of 3/4” Plant Mix Asphalt Class I in accordance with Section 810 –
Asphalt of the ISPWC . The asphalt cement performance grade shall be PG 70-28 and shall contain
½% of heat-stable anti-stripping agent per ton of asphalt cement added immediately prior to use
Ada County Highway District | Standard Special Provisions
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at the location of the asphalt batch plant. Asphalt tack material shall be a SS-1 emulsified asphalt
diluted as specified in accordance with ISPWC Division 800 – Aggregate and Asphalt.
Workmanship: This item shall also include excavation, labor, equipment necessary to complete the
repair of the existing asphalt roadway to match the grade of curbs, sidewalks, driveway
approaches and existing asphalt.
Measurement and Payment:
Material costs associated with the furnishing and placement of an asphalt tack coat on the lip of
the gutter and on the edges of previously placed asphalt are considered incidental to this item.
Payment for this item will be made under:
SSP 08120
17. SSP 08125
Asphalt Repair-Arterial & Collector......................................... Per Square Yard
Asphalt Repair - Other
Description: This item shall include all work and costs associated with the repair of existing local
roads, asphalt driveways, parking lots, and sidewalks abutting the project to match the grade of
curbs, sidewalks, driveway approaches, and existing asphalt.
Materials: This item shall include excavation, labor, equipment, and materials necessary to
complete placement of a 4” (inch) thickness of 3/4” (inch) aggregate base course, on a compacted
sub-grade, and a 2-1/2” (inch) thickness of ½” Plant Mix Asphalt Class II. The asphalt cement
performance grade shall be PG 58-28 and shall contain ½% of heat-stable anti-stripping agent per
ton of asphalt cement added immediately prior to use at the location of the asphalt batch plant.
Asphalt tack material shall be a SS-1 emulsified asphalt diluted as specified in accordance with
ISPWC Division 800 – “Aggregate and Asphalt.”
Workmanship: This item shall also include all costs associated with the furnishing and placement
of an asphalt tack coat on the lip of the gutter and on the edges of previously placed asphalt.
Measurement and Payment:
Payment for this item will be made under:
SSP 08125
18. SSP 08133
Asphalt Repair - Other............................................................. Per Square Yard
Scrub Coat
Description: This item shall include all costs associated with repair of any areas where the
pavement has been totally removed as a result of the rotomilling operation.
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Materials: All gravel shall conform to Section 802 – Aggregates and all asphalt shall conform to
Section 805 – Asphalt of the ISPWC.
Workmanship: Required work shall include, but not necessarily be limited to, excavation of the
exposed rotomilled area to a depth of 2-inches below the rotomilled surface; providing any
necessary 3/4-inch minus gravel; compaction of the gravel; tack coat; 2-inch thick asphalt repair;
cleaning of the work area; labor, tools and any other incidentals, including traffic control,
necessary to complete the work.
As part of this effort the contractor is required to have all scrub coating completed within 24 hours
after rotomilling operations have exposed the area of repair.
This item shall only be used as directed by the Engineer.
Item 29 "Variations in Quantities," page GC-16 of the General Conditions, second paragraph, shall
not apply to this item.
Measurement and Payment:
Payment for this item shall be made under:
SSP 08133
19. SSP 09001
Scrub Coat ................................................................................Per Square Yard
Sediment Box
Description: This item consists of constructing a precast or cast-in-place concrete sediment box
placed at the location and grades detailed on the plans.
Materials: Contractor shall submit stamped drawings of the box to the Engineer for approval a
minimum of one week prior to ordering. The sediment box shall be capable of withstanding an
AASHTO HS-25 loading. Manhole covers shall have “Storm Drain” cast on the top surface to label
the facility and shall conform to SD-617 Standard Manhole Frame, Cover and Riser.
Workmanship: This box shall be set to grade according to construction drawings. This item
includes costs associated with fabrication and installation of the precast or poured-in-place
sediment box including, but limited to excavation and backfill. This item also includes new
manhole rings and covers, and concrete adjusting rings.
Measurement and Payment:
Payment for this item shall be made under:
SSP 09001A
1000 Gallon Sediment Box .......................................................Per Each
SSP 09001B
1500 Gallon Sediment Box .......................................................Per Each
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20. SSP 09011
Orchard Valve
Description: This item shall include all work and costs associated with furnishing and installing new
orchard (lawn) valves at locations shown on the plans.
Materials: The tee shall be an ASTM D3034 PVC tee matching the main line size with a branch line
size. The riser pipe between the tee and orchard valve shall be ASTM D3034, SDR 35 PVC pipe.
The orchard valve shall be a Fresno Series 2000 Clover valve designed for use with SDR 35 PVC
pipe, or an approved equal.
Workmanship: The orchard valve shall be installed so that the valve opening is flush with the
adjoining natural ground surface following completion of construction and regrading of the area.
Measurement and Payment: Orchard Valve will be measured per each and shall include all labor,
equipment and material necessary for the installation as shown on the project plans including all
excavation, backfill, the tee for connection to the irrigation supply line, the riser pipe and the lawn
valve.
Payment for this item will be made under:
SSP 09011A
6” Diameter Orchard Valve .....................................................Per Each
SSP 09011B
8” Diameter Orchard Valve ......................................................Per Each
21. SSP 11001
Temporary Traffic Signal
Description: This item consists of furnishing all labor, materials and equipment necessary to install
a temporary traffic signal or make modifications to the existing traffic signal at the designated
intersection(s) shown on the plans to accommodate the approved construction traffic control
phasing for the project duration. This item includes the removal and disposal or salvage to ACHD
as required of the temporary traffic signal equipment when it is no longer needed.
Materials: Materials and workmanship shall meet the requirements of the ACHD Supplemental
Provisions to ISPWC Division 1100.
Workmanship: The Contractor shall modify the existing traffic signal systems or the proposed
traffic signal systems shown on the plans to accommodate traffic operations required for the
construction phasing. The contractor shall install the video detection cabling. The Contractor shall
coordinate with ACHD for the proposed camera locations, and shall coil 10 feet of cabling at the
proposed camera locations and in the signal cabinet. ACHD will furnish the signal equipment for a
permanent traffic signal installation, including the video detection processing unit, cameras,
mounting brackets, cabling and other equipment required for operation. ACHD will install the
cameras, terminate cabling, orient the camera, establish detection zones and calibrate the system
for operation.
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Measurement and Payment: Temporary Traffic Signal will be measured by the lump sum and shall
include all labor, equipment and material necessary for the completion of the bid item regardless
of the number of times the signal items have to be adjusted during construction.
Payment for this item will be made under:
SSP 11001
22. SSP 11002
Temporary Traffic Signal ..........................................................Per Lump Sum
Portable Changeable Message Sign
Description: This item consists of furnishing all labor, materials and equipment necessary to
provide and operate a Portable Changeable Message Sign (PCMS) at the location shown on the
plans or as directed by the Engineer.
Materials: PCMS shall be of modular design for ease of maintenance and cost effective repairs.
The sign cabinet shall be constructed of seamless aluminum extrusion with continuous welded
corners and shall be an all-weather cabinet appropriately sealed to withstand all types of weather
conditions. The sign and all of its elements and systems shall be manufactured to operate in an
ambient air temperature range of -20ºF to +160ºF. The PCMS shall consist of message sign panel,
control system, power source, and mounting and transportation trailer as follows:
Message Sign Panel - Message sign panel shall be capable of displaying a minimum of three
message lines each consisting of a minimum of eight characters per line. Each character module
shall have an 18 inch minimum height and shall use, as a minimum, a five wide-pixel by seven
high-pixel matrix with a minimum of 3 inches between characters. Each character module shall be
completely interchangeable with all other character modules. The message sign panel background
shall be black. The front face of the message sign panel shall be covered with a UV stable, impact
resistant, non-glare protective material. Each sign message shall be legible from a distance of zero
to 900 feet. The viewing angle left and right of center shall be a minimum of 17 degrees. Light
emitting diodes (LEDs) used for the character module pixel matrix, shall operate at a dominant
wavelength between 590 nm and 650 nm as defined in the 1931 CIE Chromaticity Diagram. Under
low light level conditions, the sign shall automatically adjust its light source so as to meet the
legibility requirements and not impair the drivers' vision. If a Flip Disc system is used, either as a
supplement to (LEDs) in a Hybrid PCMS or as the sole display element of the PCMS, colors shall be
retroreflective fluorescent yellow. All other minimum requirements for character and message
display stated above shall be met. The sign panel shall have the capability to rotate about its
vertical axis 360 degrees plus or minus one degree.
Power Source - The PCMS shall be equipped with a primary power source (Battery or Internal
Combustion) and a Solar or battery backup to provide continuing operation when failure of the
primary power source occurs. All batteries shall be Marine/RV deep cycle. The unit shall be
equipped with a weatherproof 120 VAC standard receptacle to allow for connection to an external
Ada County Highway District | Standard Special Provisions
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power source and must have a built-in temperature stable battery charger to allow for the
maintenance of a full charge in the Marine/RV battery source.
Control System - The control system shall include keyboard, display screen, software, backup
battery and any other hardware necessary for complete programming and operation of the sign.
The software shall have in memory a minimum of fifty (50) standard MUTCD messages and
symbols and must provide for at least fifty (50) custom messages and symbols created by the user.
The software system must also allow for download by the user of system software and the
MUTCD message and symbol library upgrades. The software must be a multiple site license to
allow for installation of sign panel programming by more than one laptop computer or by an offsite computer via modem. The control system shall incorporate a modem that is compatible with
the Department’s existing equipment to allow for remote operation by computer and cellular
phone and emergency notification via computer, cellular phone and pager. Software shall also
allow for checking battery charge level. The software system shall be capable of showing the
message on the display screen before displaying the message on the sign panel. The software
system shall be capable of providing an automatic programmed default message for low battery
conditions and emergency notification if an operational failure occurs. Emergency notification
shall be available by both cellular phone and pager. The system shall be capable of maintaining
continuous memory via a backup battery when power is unavailable.
Mounting and Transportation Trailer - The entire PCMS system shall be mounted on a
transportation trailer with standard ball type hitch, safety chains and an easily removable or
collapsible tongue. The solar panel should be angled to prevent the accumulation of rain or snow.
An internal combustion engine, if part of the system, shall be securely mounted to prevent
vibration of the rest of the assembly and a fuel gauge shall be included. The trailer shall be
equipped with a battery charge level indicator, as a minimum and additional ammeter gauges if
powered by an internal combustion power source. The message sign panel mounting apparatus
shall be extendible so that the panel can operate at a minimum height of 7 feet from the roadway
surface to bottom of the panel. The PCMS and the solar panel shall be capable of withstanding
wind gusts up to 80 mph when in operating position with outriggers in place. The trailer wire
harness shall extend a minimum of 24 inches beyond the hitch ball and shall be equipped with an
automotive style trailer plug to match the Department’s specifications.
Workmanship: The Contractor shall be responsible for furnishing, erecting, programming, and
maintaining the PCMS. The Contractor shall also be responsible for changing display messages and
relocating the PCMS as shown on the approved traffic control plans or as otherwise directed by
ACHD, for the duration of the project. The PCMS shall be capable of being operated 24 hours per
day during construction operations in accordance with American Traffic Safety Service Association
(ATSSA) Guidelines for the Use of Portable Changeable Message Signs and in accordance with Part
VI of the Manual on Uniform Traffic Control Devices (MUTCD) as adopted by the State of Idaho.
Ada County Highway District | Standard Special Provisions
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Measurement and Payment: Portable Changeable Message Sign will be measured by the hour of
sign operation for each sign and shall include all labor, equipment and material as necessary for
completion of the bid item. Contractor shall weekly submit a detailed usage report including
location, date and hours used.
ITEM 29, “VARIATIONS IN QUANTITIES”, ON PAGE GC16 OF THE ACHD GENERAL CONDITIONS,
SECOND PARAGRAPH, shall not apply to this bid item.
The accepted quantity for Portable Changeable Message Sign will be paid at the contract unit price
for the item listed below.
Payment for this item will be made under:
SSP 11002
23. SSP 11008
Portable Changeable Message Sign.........................................Per Hour
Portable Flood Lights
Description: This item shall include all costs associated with the installation, operation, movement
and maintenance of portable flood lights at the locations shown on the plans or as directed by the
Engineer. Contractor shall weekly submit a detailed usage report including location, date and
hours used.
Measurement and Payment:
Payment for this item will be made under:
SSP 11008
24. SSP 11101
Portable Flood Lights ...............................................................Per Hour
2" Diameter Schedule 40 PVC Signal Conduit
Description: This item shall consist of all work and costs associated with installing 2” Diameter
Schedule 40 PVC conduit material including excavation, backfill, adhesive and any other material
and equipment needed to install conduit as shown on the plans. The PVC conduit shall be installed
and tested so all connections are watertight.
Materials: All conduits shall conform to ASTM D 1784, NEMA TC-2 (EPC-40) and U.L. Std. 651.
Workmanship: All work shall be done in accordance with the ISPWC and adopted supplements,
including the Ada County Highway District Division 1100 supplement to the ISPWC.
Measurement and Payment:
Payment for this item will be made under:
SSP 11101
2" Dia. Schedule 40 PVC Signal Conduit ..................................Per Linear Foot
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25. SSP 11228
Signal Loop Installation – Preformed
Description: This item shall include all costs associated with the installation of new preformed
traffic loops and providing leads to the existing junction signal boxes.
Materials: All work shall be in accordance with Section 1131.02 of the ACHD Supplemental Traffic
Provisions to the ISPWC. Loops shall be placed in accordance with Standard Drawing SD-1101.
Workmanship: ACHD Traffic personnel will be responsible to make all required connections at the
junction boxes once the leads are provided. ACHD Traffic personnel will require a minimum of 24hours advance notice so that they can be onsite when the loops are installed.
Contact the Signal Maintenance Crew Chief at 387-6190 to coordinate with the ACHD Traffic
Operations.
Measurement and Payment:
Payment for this item will be made under:
SSP 11228
26. SSP 11230
Signal Loop Installation – Preformed ......................................Per Each
Information Sign
Description: This item shall include all work and costs associated with the installation of the
information signs at the locations shown on the plans or as directed by the Engineer.
Materials & Workmanship: The information signs shall be installed at locations as shown on the
plans. Information Signs shall be constructed per Division 2000 – Miscellaneous of the ISPWC
Specifications and in accordance with Standard Drawing SD-2010A and SD-2010B.
Measurement and Payment:
Payment for this item will be made under:
SSP 11230
27. SSP 11235
Information Sign .....................................................................Per Each
Video Detection Camera
Description: This item shall include all costs associated with the installation of video detection
cameras and associated wiring onto existing signal systems as shown on the plans or as directed
by the engineer.
Materials: ACHD shall provide the cameras, associated hardware and special cable
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Workmanship: All work shall be in accordance with Section 1131.03 of the ACHD Supplemental
Traffic Provisions. The contractor shall install the cameras and pull the cables from the cameras
into the controller cabinet.
ACHD Traffic personnel will be responsible to make all required connections at the controller
cabinet and at the camera once the cables have been installed. ACHD Traffic personnel will require
a minimum of 24-hours advance notice so that they can be onsite to monitor layout and provide
inspections when the cameras and cables are installed.
One camera will be installed for each direction as shown on the project drawings.
Contact Mr. Tony Kinch at 387-6190 to coordinate with the ACHD Traffic Operations.
For use tax purposes, the following prices apply to the materials provided by ACHD for this item:
Video Cameras & Hardware…..$4,000.00 EA
Video Cable……………………...$0.75 LF
On June 16, 2010, Ada County Highway District (ACHD) received guidance from the Idaho
Division of Building Safety concerning the installation of Video Detection Cameras. The
guidance requires camera installations to be completed by a journeyman electrician
licensed in the State of Idaho. The guidance also requires that subcontractor to be in
possession of a 16700 Communications Specialty Public Works License. ACHD requires all
Bidders to list the information required to comply with Idaho Code 67-2310 in the matrix
provided under Paragraph 13 of the Proposal Form contained within the Contract
Documents. Failure to name subcontractors as required by this section and Idaho Code shall
render any bid submitted by the Bidder as unresponsive and void.
Measurement and Payment:
Payment shall be on a per each camera installed basis.
SSP 11230
28. SSP 11450
Video Detection Camera ..........................................................Per Each
Temporary Pavement Markings
Description: This item consists of furnishing all labor, materials and equipment necessary to survey
and to establish temporary pavement markings.
Materials: The Contractor shall record the location of existing pavement markings on plans or
sketches and produce a report explaining the recording procedure for submittal to ACHD. The
Contractor shall also place field reference stakes that show offsets to those existing pavement
markings to facilitate their replacement. Temporary pavement markings shall consist of reflective
adhesive traffic tape accepted by the Engineer.
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Workmanship: All plans or sketches, and report shall be the responsibility of the Contractor. These
plans or sketches shall be produced to scale. All reports shall be comprehendible and complete
with details sufficient to replace all existing pavement markings that are within the project limits.
Two copies of the plans, sketches and report shall be delivered to ACHD prior to the start of any
construction activity that would affect the existing pavement markings. The re-establishment of
pavement markings shall be the placement of reference spots using paint and temporary tape.
The paint or tape used to reestablish pavement markings should match the color of the
corresponding pavement markings.
It shall be the contractor’s responsibility for accomplishing the re-establishment of the temporary
pavement markings on each course of each day prior to allowing the traffic to travel on the
roadway.
On each lane line, a reference spot shall be placed a distance no greater than 50 foot intervals. On
tapers, the interval shall be 25 feet. The beginning and end of no passing zones shall be marked by
placing 2 spots to the right of the lane line spot to signify the beginning of a no passing zone, and
placing 1 spot to the right of the lane line spot at the end of the no passing zone. All arrows and
miscellaneous message markings shall be marked to indicate the center line location of each item.
Measurement and Payment: Temporary Pavement Markings will be paid for by the lump sum and
shall include all labor, equipment and material necessary for the completion of the bid item.
Payment for this item will be made under:
SSP 11450
29. SSP 20003
Temporary Pavement Markings .............................................Per Lump Sum
Temporary Construction Fencing
Description: This item consists of furnishing all labor, equipment and material necessary to
construct and maintain temporary construction fencing at the locations shown on the plans or as
directed by ACHD. This item also includes removing and disposing of the fence at the completion
of construction or when directed by ACHD.
Materials: Temporary construction fencing shall be safety orange plastic construction fencing four
(4) feet in height, such as DG Industries PSF Series Plastic Fence or approved equal.
Workmanship: Temporary construction fencing shall be attached to steel posts at a maximum
spacing of eight (8) feet on center and plumb. The fencing shall be installed in a manner to
contain children and pets on the properties adjacent to the construction area.
Measurement and Payment: Temporary Construction Fencing will be measured per linear foot of
fence constructed and shall include all labor, equipment and material necessary for the
completion of the bid item. Routine maintenance of the temporary construction fencing shall be
Ada County Highway District | Standard Special Provisions
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necessary and is considered incidental to this item. The costs for fence maintenance and removal
and disposal of the fence are incidental to this bid item.
Payment for this item will be made under:
SSP 20003
30. SSP 20006
Temporary Construction Fencing .............................................Per Linear Foot
Raised Channelization
Description: This item shall include all work and costs associated with the construction of the
raised channelization as shown on the plans.
Materials & Workmanship: Raised channelization shall be constructed per Division 700 - Concrete
of the ISPWC Specifications and in accordance with ITD Standard Drawing H-1.
Measurement and Payment:
Payment for this item will be made under:
SSP 20006
31. SSP 20009
Raised Channelization .............................................................Per Linear Foot
Remove & Reset Fence
Description: This item shall consist of all labor, equipment, braces, posts, gates, and all additional
materials necessary to remove and reset fence where shown on the plans, or to existing parallel
property line.
Materials: Fencing materials shall consist of all salvaged materials from fence removal, along with
all necessary new materials, which shall match as closely as possible with existing materials, and
shall meet or exceed the quality of the original fencing materials.
Workmanship: The Contractor shall use caution when removing the existing fence in order to
reuse existing material (when applicable). If an instance arises, that a portion of the fence needs
to be replaced, the contractor is responsible for all costs and expenses that should arise in each
occurrence. The fence shall be replaced to its original condition, or to a condition that’s
acceptable to both the Engineer and the property owner.
Measurement and Payment:
Payment for this item will be made under:
SSP 20009
Remove & Reset Fence .............................................................Per Linear Foot
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32. SSP 20020
Install Removable Bollards
Description: This item consists of furnishing all labor, equipment and material necessary for
providing and installing removable bollards where indicated on the plans or as directed by the
Engineer.
Materials: Bollards are to be constructed of (material to be determined)
Workmanship: Bollards shall be placed at the locations shown on the plans. Bollards at entrances
to driveways or roadways shall be spaced 6 feet center to center. Refer to the plan details for
additional information.
Measurement and Payment:
Payment for this item will be made under:
SSP 20020
33. SSP 20105.01A
Install Removable Bollards ......................................................Per Each
Metal Guardrail Terminal Type 1A
Description: This item shall include all costs associated with furnishing and installing a Type 1A
terminus in reasonably close conformity to where shown on the plans or as directed by the
Engineer.
Materials & Workmanship: Terminal section shall be installed per ITD Specifications and Standard
Drawing G-1-E and G-1-B.
Measurement and Payment: This item shall include guardrail, guardrail posts, guardrail transition
sections, and related hardware required for the installation as shown on the plans.
Payment for this item will be made under:
SSP 20105.01A Metal Guardrail Terminal Type 1A................................................. Per Each
34. SSP 20105.03
Metal Guardrail Terminal Type 3
Description: This item shall include all costs associated with furnishing and installing a Type 3
terminus in reasonably close conformity to where shown on the plans or as directed by the
Engineer.
Materials & Workmanship: Terminal section shall be installed per ITD Specifications and Standard
Drawing G-1-E and G-1-B.
Measurement and Payment: This item shall include guardrail, guardrail posts, guardrail transition
sections, and related hardware required for the installation as shown on the plans.
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Payment for this item will be made under:
SSP 20105.03
Metal Guardrail Terminal Type 3 …………… .................................... Per Each
35. SSP 20105.07
Metal Guardrail Terminal Type 7
Description: This item shall include all costs associated with furnishing and installing a Type 7
terminus in reasonably close conformity to where shown on the plans or as directed by the
Engineer.
Materials & Workmanship: Terminal section shall be installed per ITD Specifications and Standard
Drawing G-1-E and G-1-B.
Measurement and Payment: This item shall include guardrail, guardrail posts, guardrail transition
sections, and related hardware required for the installation as shown on the plans.
Payment for this item will be made under:
SSP 20105.07
Metal Guardrail Terminal Type 7 …………… .................................... Per Each
36. SSP 20105.08
Metal Guardrail Terminal Type 8
Description: This item shall include all costs associated with furnishing and installing a Type 8
terminus in reasonably close conformity to where shown on the plans or as directed by the
Engineer.
Materials & Workmanship: Terminal section shall be installed per ITD Specifications and Standard
Drawing G-1-E and G-1-B.
Measurement and Payment: This item shall include guardrail, guardrail posts, guardrail transition
sections, and related hardware required for the installation as shown on the plans.
Payment for this item will be made under:
SSP 20105.08
Metal Guardrail Terminal Type 8 …………… .................................... Per Each
37. SSP 20105.010
Metal Guardrail Terminal Type 10
Description: This item shall include all costs associated with furnishing and installing a Type 10
terminus in reasonably close conformity to where shown on the plans or as directed by the
Engineer.
Materials & Workmanship: Terminal section shall be installed per ITD Specifications and Standard
Drawing G-1-E and G-1-B.
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Measurement and Payment: This item shall include guardrail, guardrail posts, guardrail transition
sections, and related hardware required for the installation as shown on the plans.
Payment for this item will be made under:
SSP 20105.010 Metal Guardrail Terminal Type 10 …………… .................................. Per Each
38. SSP 20105.011
Metal Guardrail Terminal Type 11
Description: This item shall include all costs associated with furnishing and installing a Type 11
terminus in reasonably close conformity to where shown on the plans or as directed by the
Engineer.
Materials & Workmanship: Terminal section shall be installed per ITD Specifications and Standard
Drawing G-1-E and G-1-B.
Measurement and Payment: This item shall include guardrail, guardrail posts, guardrail transition
sections, and related hardware required for the installation as shown on the plans.
Payment for this item will be made under:
SSP 20105.011 Metal Guardrail Terminal Type 11 …………… .................................. Per Each
39. SSP 20105.A
W Beam Guardrail for Minor Structures
(One Post Missing Option)
Description: This item shall include all costs associated with furnishing and installing one W Beam
Guardrail Installation for Minor Structures (One Post Missing Option) in reasonably close
conformity to where shown on the plans or as directed by the engineer.
Materials & Workmanship: W Beam Guardrail for Minor Structures (One Post Missing Option)
shall be installed per the plans, ITD specifications Section 612, and ITD Standard Drawing G-1-L.
Guardrail slope treatment Type B shall apply for post installation.
Measurement and Payment: W Beam Guardrail for Minor Structures (One Post Missing Option)
will be measured per each and shall include all labor, equipment and material necessary for the
completion of the bid item.
Payment for this item will be made under:
SSP 20105.A W Beam Guardrail for Minor Structures (One Post Missing Option)……………Per Each
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40. SSP 20105.B
W Beam Guardrail for Minor Structures
(Two Posts Missing Option)
Description: This item shall include all costs associated with furnishing and installing one W Beam
Guardrail Installation for Minor Structures (Two Post Missing Option) in reasonably close
conformity to where shown on the plans or as directed by the engineer.
Materials & Workmanship: W Beam Guardrail for Minor Structures (Two Posts Missing Option)
shall be installed per the plans, ITD specifications Section 612, and ITD Standard Drawing G-1-L.
Guardrail slope treatment Type B shall apply for post installation.
Measurement and Payment: W Beam Guardrail for Minor Structures (Two Posts Missing Option)
will be measured per each and shall include all labor, equipment and material necessary for the
completion of the bid item.
Payment for this item will be made under:
SSP20105.B
41. SSP 20109
W Beam Guardrail for Minor Structures (Two Posts Missing Option)……………Per Each
Pedestrian Bridge Railing
Description: This item consists of furnishing and installing the pedestrian rail on the bridge at
locations shown on the drawings.
Materials & Workmanship: All joints shall be welded unless the Engineer specifically approves
other fastening methods. Finish exposed welds flush and smooth. Accurately set and securely
attach work plumb and level.
This item shall include furnishing and applying paint in accordance with the manufacturer’s
recommendations and ITD Standard Specification, Section 627.03, Part C. The railing shall be
painted with No. D Paint System, Powder Coating for New Steel Bridge Rails.
Primer – Generic Type, Zinc-rich epoxy powder coating
Topcoat – Generic Type, TGIC – Polyester powder coating. Color – Black
Special Requirements for Paint System D.
Coating shall have the following minimum thicknesses:
Coat
Prime
Topcoat
Formula
Zinc-rich epoxy powder coating
TGIC-Polyester powder coating
Minimum Dry
Film Thickness
3 mils
2 mils
Ada County Highway District | Standard Special Provisions
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Coating shall conform to the following performance criteria:
Property
Adhesion
Pencil hardness
Flexibility
Impact resistance
Abrasion resistance
Salt spray resistance
Humidity resistance
Reference
ASTM Designation:
D 3359B
ASTM Designation:
D 3363
ASTM Designation:
D 522
ASTM Designation:
D 2794, Modified
ASTM Designation:
D 4060, Modified
ASTM Designation:
B 117
ASTM Designation
D 2247
Measurement and Payment:
Payment for this item will be made under:
SSP 20109 Pedestrian Bridge Railing .........................................................Per Linear Foot
42. SSP 20113
Block Retaining Wall
Description: This item shall include all work and costs associated with the design and construction
of block retaining wall in accordance with the lines, grades, details and dimensions shown on the
plans. Preliminary dimensions are given for estimating purposes only. The Contractor is
responsible for producing a design, which will provide for a complete installation including leveling
pad requirements, backfill material quality and density requirements.
Materials: The Genesis Wall System composed of the Keystone Retaining Wall System or
approved equal is approved for this project.
Workmanship: The wall surface shall be constructed within a tolerance of 3/4" per 10 feet of wall
length. The exposed surface of the wall units shall be sound, free of cracks, chips and other
imperfections when viewed from a distance of 20 feet. Acceptable color for the wall units is as
shown on the plans, standard gray or as directed by the Engineer.
At least three weeks prior to the beginning of construction of the wall the Contractor shall provide
six sets of design drawings and details and complete design calculations stamped by a professional
engineer licensed in the State of Idaho for the mechanically stabilized earth retaining wall system
to be constructed. The drawings shall include all details, dimensions, quantities and cross sections
Ada County Highway District | Standard Special Provisions
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necessary to construct the wall. Construction cannot begin without the review and approval of the
drawings by the owner. The plans shall include, but not be limited to, plan, elevation and detail
sheets containing the following:





An elevation view indicating the elevations at all the break points in the top of the wall and
the leveling pad, distances along the face of the wall to each break point and panel
designation.
A plan view of the wall with dimensions, stations and offsets tying it to the centerline of the
road and with station and offsets to the excavation limits. The excavation limits will be
based upon the cross sections in the plans or on field data developed by the Contractor.
A materials takeoff shall be submitted with the calculations that include quantities for the
excavation and backfill within the reinforced zone.
All details for the leveling pad, dimensions of the blocks and reinforcement placement plans.
Reinforcement placement plans need to reflect angled straps at locations required due to
the skew of the abutment walls.
Details of the cast-in-place concrete cap (sidewalk and ramp).
Measurement and Payment: The unit of measurement for furnishing all materials, fabricating,
constructing and erecting the concrete block units, attachment devices, fasteners, bearing blocks
and shims, excavation, leveling pad and backfill and concrete cap including all labor, materials,
equipment and incidentals for a complete installation, shall be the square foot of wall surface area
constructed, measured from the top of the leveling pad to the top of the wall units, over the
length of the wall. Measurement shall be along the exterior face of the wall. The bicycle rail is a
separate bid item.
ITEM 29, “VARIATIONS IN QUANTITIES,” ON PAGE GC16 OF THE ACHD GENERAL CONDITIONS,
SECOND PARAGRAPH, shall not apply to this bid item.
Payment for this item will be made under:
SSP 20113
43. SSP 20114
Block Retaining Wall...........................................................Per Square Foot
Mechanically Stabilized Earth (MSE) Retaining Wall
Description: This item shall include all work and costs associated with the design and the
construction of mechanically stabilized earth (MSE) retaining walls in accordance with the lines,
grades, details and dimensions shown on the plans. Preliminary dimensions are given for
estimating purposes only.
Materials: The Contractor, based upon his chosen proprietary system, is responsible for producing
a design which will establish soil reinforcing configuration and length and connection to precast
concrete wall facing units, leveling pad requirements and reinforcing zone backfill material quality
and density requirements. The wall system shall also be designed for all loads from the
Ada County Highway District | Standard Special Provisions
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cap/sidewalk, cap/ramp, and railing. The cast-in-place concrete cap/sidewalk and the metal railing
at the top of the wall are not included in this item.
This item includes excavation for the MSE wall at the toe of the wall. The excavation pay limits are
shown on the plans.
This item includes providing the required exposed aggregate texture to the exposed faces of the
wall as called out on the plans. It also includes applying a urethane anti-graffiti finish to the
exposed faces of the concrete cap.
Workmanship: The Contractor shall be responsible to conduct soils investigations and tests to
determine the properties of the material source and to provide suitable material for the
reinforced backfill zone as required by the design of the MSE wall and these specifications. Two
copies of all test results shall be submitted to the Engineer at least three weeks prior to the
beginning of the construction of the wall.
At least three weeks prior to the beginning of construction of the wall the Contractor shall provide
six sets of design drawings and details and complete design calculations stamped by a professional
engineer licensed in the State of Idaho for the mechanically stabilized earth retaining wall system
to be constructed. The drawings shall include all details, dimensions, quantities and cross sections
necessary to construct the wall. Construction cannot begin without the review and approval of the
drawings by the owner. The plans shall include, but not be limited to, plan, elevation and detail
sheets containing the following:





An elevation view indicating the elevations at all the break points in the top of the wall
and the leveling pad, distances along the face of the wall to each break point and panel
designation.
A plan view of the wall with dimensions, stations and offsets tying it to the centerline of
the road and with station and offsets to the excavation limits. The excavation limits will be
based upon the cross sections in the plans or on field data developed by the Contractor.
A materials takeoff shall be submitted with the calculations that include quantities for the
excavation and backfill within the reinforced zone.
All details for the leveling pad, dimensions of the panels or modules and reinforcement
placement plans. Reinforcement placement plans need to reflect angled straps at
locations required due to the skew of the abutment walls.
Details of the cast-in-place concrete cap (sidewalk and ramp).
The Contractor shall furnish the Engineer a Certificate of Compliance certifying that the materials
installed comply with these specifications and the requirements of the designer and supplier of
the wall components.
Ada County Highway District | Standard Special Provisions
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APPROVED WALL SYSTEMS
The following mechanically stabilized earth retaining wall systems are approved for this project:
a) A reinforced earth wall as designed by THE REINFORCED EARTH COMPANY.
b) A retained earth wall as designed by VSL CORPORATION.
The Contractor shall indicate on the bid schedule, in the space provided, which wall system
will be used.
DESIGN PARAMETERS
Design Life: The MSE retaining wall shall be designed and constructed to provide a minimum
SERVICE LIFE of 75 years and an ULTIMATE LIFE in excess of 100 years in conformance with FHWA
GEOTECHNICAL ENGINEERING NOTEBOOK Chapter 5, Section 3, and Subsection 4 “SERVICE LIFE
OF MECHANICALLY STABILIZED EMBANKMENTS.”
Design Loads: The MSE retaining wall shall be designed in accordance with the latest edition and
interim of the AASHTO Standard Specifications for Highway Bridges.
The MSE retaining wall shall be designed for an HS-25 traffic load at the top of the wall, which may
be represented by a 2.5-ft. thick layer of soil surcharging the top of the wall.
Where the MSE wall is placed against the bridge abutments with angles less than 90 degrees, the
walls shall be designed using skewed straps.
The MSE retaining wall shall be designed for loads from the cap/sidewalk, cap/ramp and railing.
Geotechnical Parameters: The leveling pads and the wall toe pressure shall be designed for a
maximum allowable bearing pressure of 10,000 pounds per square foot. The leveling pads shall
have a minimum width of 12 inches, or a width determined by the designer of the wall, whichever
is larger.
Backfill: The backfill material, gradation, compaction requirements and methods of compaction
within the reinforced soil zone shall be in accordance with the requirements of the manufacturer
of the wall components and these minimum specifications. The backfill material in the reinforced
soil zone shall have a maximum aggregate size of 3 inches. The backfill material in the reinforced
soil zone shall be compacted to at least 95% of maximum dry density determined according to
AASHTO T-99 or 60% relative density based on ASTM D4253 and D4254.
The backfill within the reinforced soil zone shall meet the following additional requirements:
a) The fraction finer than 15 microns, as determined by AASHTO T-88, shall not exceed 15%
b) Plasticity Index (P.I.) as determined in AASHTO T-90 shall not exceed 6
c) Organic Content shall not exceed 0.2% per AASHTO T 267-86
Ada County Highway District | Standard Special Provisions
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d)
e)
f)
g)
h)
i)
j)
pH shall be between 5 and 10 per ASTM G51-77
Resistivity shall be equal to or greater than 3000 ohm-centimeters per ASTM G57-78
Chlorides shall be less than 100 parts per million per ASTM D512-88 or D4327
Sulfates shall be less than 200 parts per million per ASTM D516 (B) or D4327.
Soundness: Magnesium sulfate loss shall be less than 30% after 4 cycles per AASHTO T104
No shale or soft, poor durability materials shall be included.
The backfill at the toe of the wall and behind the reinforced soil zone except bridge
abutments shall be 8 inch minus uncrushed aggregate. The material and construction of
this backfill shall conform to Section 800 of the ISPWC.
CONSTRUCTION REQUIREMENTS
Field Representative: The Contractor shall have a field representative from the supplier of the wall
components and a field representative from the supplier of the soil reinforcing, if different from
the supplier of the wall components, on site at the beginning of the erection of the wall. The
representatives shall be fully knowledgeable in the specific design and construction requirements
of the MSE wall to be constructed. As a minimum, the representatives shall stay on site assisting
the fabricator, Contractor and Engineer during the initial three days of wall construction. The MSE
wall erection shall begin only if the representatives are on site. In addition, the field
representatives shall be available for consultation as required during the entire erection process.
The costs of the services of the field representatives shall be incidental to the cost of the wall.
Stepped Footings: The elevations of the bottom of the footings to provide a minimum cover are
shown on the plans. The footings shall be stepped to meet the configuration of the wall system
selected and shall maintain the minimum cover as shown on the plans.
Wall Configuration: The top of the wall shall be constructed and finished to the elevations shown
on the plans. The top of the wall shall be capped with a cast-in-place concrete cap. The pattern of
the wall joints shall be set vertical and horizontal. This may require the tops of wall panels to be
fabricated on a slope. The wall face shall be vertical. The wall surface shall be constructed within a
tolerance of 3/4 of an inch per 10 feet of wall height or length. Soil reinforcement straps will need
to be attached at the appropriate skew angle shown on the plans for panels adjacent to the
abutment walls. The wall edges next to the abutments shall be beveled to match the joining angle.
Joint Materials: Bearing pads, joint filler and joint cover shall be as required on the approved
plans. All joints between wall panels shall be covered with a minimum 18 inch wide strip of
geotextile filter fabric material. The geotextile filter fabric material shall be attached to the back of
the wall panels with an adhesive approved by the wall supplier. Overlaps between strips of
geotextile shall be at least 4 inches.
Wall Finish: The exposed surface of the wall units shall be sound, free of cracks, chips or other
imperfections when viewed from a distance of 10 ft.
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The exposed surface of the wall shall be textured as shown on the plans.
Urethane Coating: The exposed surfaces of the wall, concrete cap, and parapet shall be coated
with a urethane clear finish.
The urethane clear finish shall be: Benjamin Moore & Co. M74-00/M75 aliphatic acrylic urethane
gloss clear finish available through Boise Paint & Glass; or Kemiko "Wipe-out" urethane clear finish
available through Pioneer Coatings; or an approved equal.
The urethane clear finish shall be applied in accordance with the manufacturer's
recommendations to achieve a minimum wet film thickness of 4 mils. Textured surfaces such as
fractured fin or exposed aggregate will require two full finish coats or a total of 5 to 6 mils wet film
thickness.
Measurement and Payment:
MSE Wall: The unit of measurement for designing, furnishing all materials, fabricating,
constructing and erecting the MSE wall, including footings, concrete wall units, soil
reinforcements, attachment devices, fasteners, bearing blocks and shims, joint materials, leveling
pad and backfill within the reinforced soil zone, including all labor, materials, equipment and
incidentals for a complete installation, shall be by the square foot of wall surface area constructed,
measured from the top of the leveling pad to the top of the wall units including any wall cap, over
the length of the wall. Measurement shall be along the exterior face of the wall.
MSE Wall Excavation and Backfill: All excavation and backfill required for construction of the MSE
wall is included in the MSE wall quantity and shall be considered incidental to Item SSP 20114,
MSE Retaining Wall. Any excavation and over excavation beyond the limits shown on the plans or
for the Contractor's convenience shall be at the Contractor's expense.
Urethane Coating: All costs incurred for the urethane coating shall include all materials
equipment, labor, and incidentals complete and shall be considered incidental to the MSE wall and
no additional payment made therefore.
ITEM 29, “VARIATIONS IN QUANTITIES,” ON PAGE GC16 OF THE ACHD GENERAL CONDITIONS,
SECOND PARAGRAPH, shall not apply to this bid item.
Payment for this item will be made under:
SSP 20114
Mechanically Stabilized Earth (MSE) Retaining Wall ..............Per Square Foot
Ada County Highway District | Standard Special Provisions
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44. SSP 25020
Erosion Control Mat
Description: This work consists of furnishing and installing Erosion Control Mats (ECM) on the
bottoms and side slopes of embankments, channels or as shown on the plans or as directed by the
Engineer.
Materials: The ECM shall conform to the following properties:
Geotextile Property
Test Method
Typical
Thickness:
ASTM D-6525
0.4 in
Resiliency:
ASTM D-6524
80%
Mass per Unit Area:
ASTM D-6566
13.5 oz/yd2
Tensile Strength:
ASTM D-6818
4000x3000 lbs/ft
Tensile Elongation:
ASTM D-6818
65%
Light Penetration
ASTM D-6567
10%
Flexibility/Stiffness:
ASTM D-6575
0.534 in-lbs
UV Resistance:
ASTM D-4355
90% at 6000 hrs
The ECM shall be constructed of a three-dimensional matrix of polypropylene yarns designed in a
uniform, dimensionally stable and homogenous configuration of pyramid-like structures.
Workmanship: In areas where ECM is to be installed, the Contractor shall prepare the topsoil by
removing all rocks, clods, vegetation or other obstructions so that the installed ECM will have
direct contact with the soil surface. Lay the ECM loose to maintain direct contact with the soil and
anchor as specified by manufacturer for the specific application (banks or channel bottom). Apply
seed and fertilizer as specified in SSP 29060 Hydroseeding. After seeding, spread and rake ½ inch
of tine topsoil into the ECM and completely fill the voids. Use the backside of a rake or other flat
tools to ensure a smooth soil-filled surface. Use shovels, rakes or brooms for fine grading and
finishing. Smooth soil fill in order to just expose the top of the ECM matrix.
After completion of the work, the Contractor shall request an inspection by the engineer. The
Contractor shall correct all conditions unsatisfactory to the Engineer within a 5-day period
immediately following the inspection.
Measurement and Payment: ECM will be measured by the square yard complete in place,
including but not limited to preparation of the topsoil base and topsoil filling. Placement of ECM
shall be limited to the areas defined on the plans, or as directed by the Engineer.
Ada County Highway District | Standard Special Provisions
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Payment for this item will be made under:
SSP 25020
45. SSP 25030
Erosion Control Mat ................................................................Per Square Yard
Demolish & Remove Existing Building
Description: This item shall include all work and costs associated with building demolishment and
removal in the areas as shown on the plans.
Materials & Workmanship: These removals shall be completed within the first 30 days of the
construction schedule, unless otherwise approved by the Engineer. Contact the ACHD Utility
Coordinator at 387-6258 prior to building demolition to coordinate the capping of existing utilities.
The cost to cap the utilities to the individual properties is included in this item. Contractor is
required to schedule an inspection with city inspector to verify that the utilities have been capped.
Contractor is required to provide a copy of the city certification that the utilities have been capped
to ACHD Property Manager.
Contractor is to obtain any permits necessary to demolish the structure, including but not limited
to asbestos/hazard materials.
The Contractor shall entirely remove all structures, foundations, slabs, underground tanks, or
other appurtenances both above and below ground.
Also included in this item are the following: Removal of all asphalt and gravel, placement of
backfill to fill cavities left by removal of items to the level of the surrounding ground, and
scarification of the entire work area to a depth of 12 inches to loosen existing material. The parcel
shall be finished graded to present a pleasing appearance with slopes rounded and flattened to
blend naturally with the adjacent topography.
Backfill shall be 8" Minus Uncrushed Aggregate conforming to ISPWC Division 800 compacted to
95 % maximum density as determined by T-99.
Four (4) inches of topsoil conforming to SSP 25050, hydro-seed with wood mulch and tackifier
shall be placed on graded areas outside the roadway section adjacent to the building removal.
Measurement and Payment:
Backfill is considered incidental to this item. Topsoil, hydro-seed, wood fiber, and tackifier shall be
paid for under other items of this contract.
Payment for this item will be made under:
SSP 25030
Demolish & Remove Existing Building .....................................Per Each
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46. SSP 25049
Sandy Topsoil
Description: This item shall include all costs associated with lining the inside surface of the storm
water detention pond with one-foot of sandy topsoil material.
Materials: The sandy topsoil shall meet the following specifications:





50% coarse sand by volume
20% sandy loam
30% compost
Less than 10% fines passing #200 sieve
No clay
Workmanship: After the pond is excavated to subgrade, the sandy topsoil shall be placed over the
surface of the pond to the limits as shown on the plans.
Measurement and Payment: Payment shall be on a cubic yard, plan unit quantity basis. No final
measurement will be made. The quantity shown in the bid schedule is based upon the design
calculations and is an estimate for bidding purposes only. The Contractor shall perform an
independent estimate of the quantity to be encountered during construction prior to bidding and
shall base his total bid amount upon his independent analysis.
Payment for this item will be made under:
SSP25049
47. SSP 25050
Sandy Topsoil…………… ................................................................... Per Cubic Yard
4” Topsoil
Description: This item shall include all work and costs associated with installing 4” of compacted
topsoil in the areas as shown on the construction plans or as directed by the Engineer.
Materials: Topsoil shall be friable, fertile, agricultural soil, containing normal amounts of macro
and micro nutrients capable of sustaining vigorous plant growth. It shall be of uniform
composition throughout, without admixture of subsoil. It shall be free of stones 1” (one inch) or
larger, lumps, sticks, live plants and their root, and other extraneous matter. It shall not be
infested with nematodes or other pest or disease organisms. It shall be free of seed of noxious
weeds and other material detrimental to vegetative growth. ACHD reserves the right to request
soil samples be tested at the Contractor’s expense to verify the topsoil is capable of sustaining
vigorous plant growth
Workmanship: Topsoil shall not be placed in its final position until the areas to be covered have
been properly prepared and grading operations in the area have been substantially complete.
Topsoil shall be placed and spread at locations shown on the plans and thickness of topsoil
placement shall be 4” (four inches) when compacted.
Ada County Highway District | Standard Special Provisions
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Measurement and Payment: ITEM 29, “VARIATIONS IN QUANTITIES,” ON PAGE GC16 OF THE
ACHD GENERAL CONDITIONS, SECOND PARAGRAPH, shall not apply to this bid item.
Payment for this item will be made under:
SSP 25050
48. SSP 25060
4” Topsoil ................................................................................. Per Square Yard
Property Owner Meeting
Description: This item shall include all work and costs associated with conducting property owner
meetings as directed by the Engineer.
Workmanship: The contractor shall arrange to have a meeting with all interested property owners
at least once a month during the contract period to inform them of work that has been completed
and what work is expected to be completed before the next scheduled meeting.
At each meeting, the contractor shall answer all questions and complaints by concerned property
owners. The contractor shall provide a flyer that is to be delivered to properties along the project
corridor. This flyer, at a minimum, shall designate the location and time of the property owner
meetings, construction phases or milestones, detour routes, and a contact person for the
contractor. The flyer must be approved by the Engineer and distributed to the affected property
owners and/or residents and ACHD’s Business Relations contact person before the start of any
construction activities on site. These meetings shall be held at the same location and time as
established on the contractor’s initial flyer to the property owners. The contractor shall provide a
representative (and phone number) for the duration of the project that the property owners along
the project corridor may contact if they have questions.
Measurement and Payment:
Payment for this item will be made under
SSP 25060
49. SSP 25062
Property Owner Meeting .........................................................Per Each
Remove Underground Septic Tank
Description: This item shall include all work and costs associated with removing an underground
septic tank as identified on the construction plans, or as may be encountered during construction.
Workmanship: The Contractor shall remove the septic tank and backfill the hole with pit run gravel
material and compacted to 95%. The septic drain field shall be abandoned in accordance with
Central District Health Department requirements. The Contractor shall field verify the location of
the tank and drain field. Any permits required to complete this work shall be the requirement of
the contractor and shall be included in the unit bid price for this item.
Ada County Highway District | Standard Special Provisions
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Measurement and Payment:
Payment for this item will be made under
SSP 25062
50. SSP 25080
Remove Underground Septic Tank........................................... Per Each
Remove & Reset Mailbox
Description: This item consists of furnishing all labor, equipment and material necessary to remove
existing mailboxes and supports, make temporary arrangements to assure uninterrupted mail
service during construction, and install new mailboxes and supports as shown on the plans or as
directed by the ACHD.
Materials: All materials shall conform to the ISPWC and the ACHD ADOPTED REVISIONS AND
SUPPLEMENTS except as noted herein. Mailbox post support and foundation shall conform to
Section 1105 for a D-1 (4-inch by 4-inch) wood post. Mailboxes shall be Postmaster General
approved.
Workmanship: The existing mailbox and support shall be removed and returned to the owner. A
new mailbox, the same size and shape as existing, shall be furnished and installed on a wood post
support and foundation. The name and address as shown on the existing mailbox shall be placed
on the new mailbox. Should the owner be satisfied with the condition of the existing mailbox, the
Contractor may reinstall the existing mailbox at the end of construction. The final location shall be
marked in the field by the Engineer.
Mail service shall not be disrupted. Access to mailbox shall be provided at all times. An acceptable
temporary mailbox stand may be installed by the Contractor during construction operations prior
to installation of the new mailbox and support.
Measurement and Payment: Remove and Reset Mailbox will be measured per each new and final
post installation and shall include all labor, equipment and material necessary for the completion
of the bid item, including all work necessary to assure uninterrupted mail service during
construction. The accepted quantity for Remove and Reset Mailbox will be paid at the contract
unit price for the item listed below. The cost of the temporary mailbox and support is considered
incidental to this bid item and no additional payment will be made.
Payment for this item will be made under:
SSP 25080
51. SSP 25115
Remove & Reset Mailbox ........................................................ Per Each
Temporary Coffer Dam
Description: This item includes all material, labor, and equipment necessary to provide and a
temporary coffer dam at the locations specified and detailed on project plans.
Ada County Highway District | Standard Special Provisions
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Materials & Workmanship: Any other variation of the specified coffer dam must be approved by
ACHD prior to utilization and may require the 404 permit to be revised. No additional time shall
be granted for any delay to a revision of the 404 permit. All items to construct the Coffer dam and
a stilling basin, including any pipe or pumping shall be covered under this item and no additional
compensation shall be granted.
Measurement and Payment: All material, labor and equipment necessary to construct, install and
maintain the coffer dam, including any piping or pumps, will be considered incidental to this bid
item and no additional compensation will be considered.
Payment for this item will be made under:
SSP 25115
52. SSP 29050
Temporary Coffer Dam ............................................................Per Lump Sum
Temporary Soil Stabilization
Description: This item shall include all work and costs associated with the application of
Temporary Soil Stabilization as shown on the plans or as directed by the Engineer.
Materials: Temporary soil stabilization shall consist of applying the following:


Wood fiber mulch and tackifier (hydro-applied)
Soilbinders or tackifiers in combination or alone (hydro-applied)
The hydro-application should be mixed and hydro-applied as follows:
1. Plant-derived soil binder or tackifier containing psylium or guar gum in accordance with
the manufacturer’s written instruction for the soil types, conditions and degree of slope.
2. Bonding fibers at 20 lb/ac.
3. Wood fiber mulch at 500 lb/ac. to 1000 lb/ac.
Workmanship: The Contractor is responsible for erosion and sediment control until permanent
measures are applied. Prior to application, the contractor shall provide documentation describing
the soil binder or tackifier, bonding fibers and wood fiber mulch for review and approval. The
contractor shall also provide certification from the manufacturer that the materials are noxious
weed free, nontoxic to animals, soil microorganisms, aquatic and plant life. The soil binder or
tackifier, bonding fibers and wood fiber mulch will not interfere with or impede seed germination
or vegetative growth/establishment.
All materials should be thoroughly mixed in a water slurry using mechanical and liquid bypass
agitation and apply uniformly to avoid runoff of the applied product. Temporary surface/soil
stabilization, unless otherwise specified, shall take place within five (5) calendar days following the
last construction activity within the designated area, or in accordance with the SWPPP. The time
limit may be extended to 14 calendar days during the seasonal dry period (June 15 to October 15).
The Contractor shall make field adjustments as necessary to ensure proper performance. Conduct
reapplications in the same manner as the original application. If permanent seeding is to be
Ada County Highway District | Standard Special Provisions
42
performed on areas where temporary surface/soil stabilization materials have been applied, the
Contractor shall reapply mulch to permanent levels.
Measurement and Payment: ITEM 29, “VARIATIONS IN QUANTITIES,” ON PAGE GC16 OF THE
ACHD GENERAL CONDITIONS, SECOND PARAGRAPH, shall not apply to this bid item.
Payment for this item will be made under:
SP 29050
53. SSP 29060
Temporary Soil Stabilization ......................................................... Per Square Yard
Hydroseeding
Description: This item shall include all work and costs associated with hydroseeding in the areas
designated on the plans or as directed by ACHD.
Materials: Hydroseeding shall consist of furnishing and installing, seed, fertilizer, mulch, and water
using the hydroseeding method. Seed shall be a dry land grass mixture prepared by a local nursery
appropriate for the Treasure Valley. Application rate of the seed mixture shall be 16 lbs/acre.
Each variety of seed shall be tested seed from the latest crop available, and shall be delivered in
standard sealed containers labeled in accordance with State and Federal Laws. The label shall
show the variety of seed, the percentage of germination, purity and weed content. All varieties of
seed shall have a minimum tested germination of 85% and contain a minimum of 80% pure seed
by weight. Seed shall not be agitated in the hydro-seeder over 30 minutes.
Fertilizer shall be of any standard brand suitable for use with the hydroseeding method, furnished
in moisture proof bags. Each bag shall be marked with the weight and manufacturer's analysis of
the ingredients. Fertilizer shall contain a minimum of 22% available nitrogen. Fertilizer shall be
applied uniformly at 440 pounds per acre. Fertilizer shall not be mixed with the seed in the hydroseeder.
Mulch shall be a wood fiber mulch commonly used in the hydroseeding process. Mulch shall be
applied at a rate of 2,000 lbs/acre.
Workmanship: Seeding shall be performed only at times when local weather conditions are
favorable for growth, which normally will occur between September 15 and November 30, or
between February 15 and May 15. The Contractor shall be responsible to protect and maintain the
seeded areas until germination, including watering if necessary.
Measurement and Payment: Construction limits for this item shall be as shown on the plans. Any
hydroseeding restoration required beyond the specified construction limits shall be made by the
Contractor at his expense and no separate payment will be made, unless additional areas are as
directed by the Engineer.
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Hydroseeding will be measured per square yard and shall include all labor, equipment and
material necessary for the completion of the bid item. The accepted quantity of Hydroseeding will
be paid at the contract unit price for the item listed below. ITEM 29, “VARIATIONS IN
QUANTITIES,” ON PAGE GC16 OF THE ACHD GENERAL CONDITIONS, SECOND PARAGRAPH, shall
not apply to this bid item.
Payment for this item will be made under:
SSP 29060
Hydroseeding ..........................................................................Per Square Yard
54. SSP 29065
Sod Repair
Description: This item consists of furnishing all labor, equipment and material necessary to repair
lawn areas with sod as shown on the plans or as directed by ACHD.
Materials: Topsoil shall be per SSP 25050.
Fertilizers shall comply with the following chemical analysis:
15% to 20%
Nitrogen (N)
20% to 25%
Phosphorous (P2O5)
2% to 10%
Potassium (K2O)
Sod shall consist of Merrion, Parks, Delta or Windsor Kentucky Bluegrass or combinations of
approved fine textured grasses suitable for the area to be sodded and closely matching adjacent
grass.
Sod repair shall take place only on those disturbed areas which currently have established lawns,
or as shown on the project plans or directed by the Engineer.
Workmanship: The lawn areas shall be tilled to a minimum depth of 6 inches by such means as will
loosen the soil and bring it to condition suitable for fine grading. Prior to and during the operation,
the surface shall be made free of vegetative growth. All stones, hard clods, roots, sticks, debris
and other matter encountered during tilling which are detrimental to the preparation of a good
seed bed, or which are toxic to the growth of grass, shall be removed. Four inches of topsoil shall
then be placed under the areas to receive sod.
The area shall be floated and rolled to bring it to the finished grade. All irregularities in the surface
that form pockets where water will stand shall be smoothed out to provide good drainage. The
finished grade of lawn area adjacent to walks, curbs, driveways and pavements shall be
approximately 1 inch below adjacent grades.
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Fertilizers shall be spread evenly over the cultivated areas at a rate of 4 pounds per 1,000 square
feet and shall be uniformly incorporated into the upper 3 inches of the soil, after which the areas
shall be worked as necessary to provide a smooth, firm but friable lawn bed at the established
grades.
Sod shall be placed in straight strips. The joints between strips shall be butted together, tight and
without gaps. Sod shall be placed in a manner to stagger the end joints of the rolls. The sod shall
be rolled with a 100-pound roller after placement. The surface of the finished sod shall be smooth,
uniform and mowable.
The Contractor shall supply a letter to the property owner once the sod is installed notifying them
the sod is installed and giving them a suggested watering schedule. Contractor shall notify
property owner in writing if property owner is not following the suggested watering schedule. A
copy of the letter will be forwarded to the Engineer.
Measurement and Payment: Lawn areas outside the construction limits that are damaged by the
Contractor shall be repaired in accordance with this special provision at the Contractor's expense.
Sod Repair will be measured per square yard of ground surface on which sod is installed and shall
include all labor, equipment and material necessary for the completion of the bid item. Topsoil
shall be measured and paid as a separate bid item.
ITEM 29, “VARIATIONS IN QUANTITIES”, ON PAGE GC16 OF THE ACHD GENERAL CONDITIONS,
SECOND PARAGRAPH, shall not apply to this bid item.
Payment for this item will be made under:
SSP 29065
55. SSP 29090
Sod Repair ................................................................................ Per Square Yard
Trim Tree
Description: This item consists of furnishing all labor, equipment and material necessary to trim
existing tree branches and prune roots at the location shown on the plans, as directed in these
specifications, or as directed by the Engineer. In general, tree trimming shall be kept to a
minimum to establish clearance for sidewalks, bike lanes, and travel lanes, and to provide a
balanced looking tree when completed.
Materials &Workmanship: The Contractor shall coordinate the work with the Engineer prior to
commencing trimming. Tree trimming and root pruning shall be performed under the direct onsite supervision of a licensed arborist.
Trim existing tree branches that hang over the sidewalk areas that are less than eight-feet above
the finished elevation. Prune tree roots within 3 inches of the back of curb to a depth of 18 inches.
Trees to be trimmed and pruned will be identified on the plans or identified by the Engineer.
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Measurement and Payment: Trim Tree will be measured per each tree trimmed and shall include
all labor, equipment and material necessary for the completion of the bid item.
ITEM 29, “VARIATIONS IN QUANTITIES,” ON PAGE GC-16 OF THE ACHD GENERAL CONDITIONS,
SECOND PARAGRAPH, shall not apply to this bid item.
Payment for this item will be made under:
SSP 29090
56. SSP 29093
Trim Tree ..................................................................................Per Each
Remove Tree 6”+
Description: This item shall include all work and costs associated with the removal of trees
measuring 6 inches or more in diameter, measured 2 feet above the ground.
Workmanship: The entire tree shall be removed, including the stump and roots, or if removal of
the roots could damage nearby structures or utilities, the Contractor shall grind up the stump and
shallow roots. Grinding operations shall be included in the unit contract price for this item.
Measurement and Payment: The removal of trees less than 6 inches in diameter and all stumps
will not be paid for separately, but shall be considered as incidental to the work of removal of
obstructions. Trees for removal shall be marked in the field by the Engineer prior to removal.
Payment for this item will be made under:
SSP 29093
57. SSP 29101
Remove Tree 6”+ ......................................................................Per Each
Remove & Reset Sprinkler System
Description: This item consists of furnishing all labor, equipment and material necessary to remove
existing sprinkler systems, install and maintain temporary sprinkler systems during construction,
adjust/relocate existing sprinkler systems, or install new sprinkler systems at the locations shown
on the plans or as directed by the Engineer.
Materials: All materials shall conform to the ISPWC and all ACHD ADOPTED SUPPLEMENTS and
shall be equal to, or of better quality than, existing materials.
Workmanship: Prior to commencement of construction, the Contractor shall document the
locations of existing sprinkler systems within the construction zone. Documentation shall include,
but is not limited to, type and location of existing sprinkler heads, pipe, controllers, valves and
control wires. Documentation shall be provided to the Engineer prior to demolition of existing
sprinkler systems. Costs associated with providing documentation of existing sprinkler systems
shall be considered incidental to this item.
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Adjusted/relocated sprinklers shall be installed to restore adequate coverage to remaining
landscape areas and new sod areas. Over-spray onto the roadway and sidewalks will not be
allowed.
The Contractor shall maintain all sprinkler systems outside of the construction zone that are
impacted by the Contractor’s activities. This may require the Contractor to install temporary
sprinkler main lines around the construction zone. All costs associated with installing and
maintaining temporary sprinkler systems and providing temporary water during construction shall
be considered incidental to this item. Contractor shall cut and cap existing lines and supplement
existing systems with additional materials as necessary.
Measurement and Payment: Remove and Reset Sprinkler System shall be measured by the linear
foot of mainline pipe that is adjusted/relocated or newly installed, and shall include all labor,
equipment and material as necessary for completion of the bid item. Providing and adjusting of
individual sprinkler heads shall be measured as ten linear feet each.
ITEM 29, “VARIATIONS IN QUANTITIES,” ON PAGE GC16 OF THE ACHD GENERAL CONDITIONS,
SECOND PARAGRAPH, shall not apply to this bid item.
Payment for this item will be made under:
SSP 29101
58. SSP 29110
Remove & Reset Sprinkler System ...........................................Per Linear Foot
Groundwater Observation Well
Description: This item shall consist of furnishing all labor; material, and equipment necessary to
construct a groundwater observation well at the location shown on the plans or as directed by the
Engineer in accordance with ISPWC Standard Drawing SD-627.
Materials: Groundwater observation wells shall consist of 4” diameter non-perforated PVC from
finished surface to the top of the drain trench, and 4” diameter perforated PVC pipe from the top
of the drain trench to the bottom of the sand bed as detailed on the plans.
Workmanship: A PVC cap shall be placed on the bottom of the perforated PVC pipe and a 8”x12”
watertight manhole with 12” galvanized skirt, Item number 318101201 as manufactured by Morris
Industries, 777 Route 23, Pompton Plains, NH 07044, (800) 835-0777, or approved equal, shall be
set flush with the finished surface on the top of the non-perforated PVC pipe. The pipe shall be
set straight and plumb. The cast iron cover shall be set flush with the finish surface in a concrete
collar.
Measurement and Payment: Groundwater observation wells shall be placed in the locations
indicated on the plans.
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Payment for this item will be made under:
SSP 29110
59. SSP 29800
Groundwater Observation Well ...............................................Per Each
Abandon Existing Septic System
Description: This item shall include all work and costs associated with abandoning of an existing
septic tank in the location shown on the plans.
Materials & Workmanship: These removals shall be completed within the first 45 days of the
construction schedule, unless otherwise approved by the Engineer. This work shall be
coordinated so that Bid Item 504.4.1.D.1 Sewer Service Connection to Main – Size 4 Inch is
completed at the same time.
Contractor is required to contact property owner 14 days in advance to coordinate the timing for
the abandonment of the septic tank.
Contractor is to obtain any permits necessary to abandon existing septic tank.
Contractor shall punch holes in the bottom of the tank to facilitate drainage and then backfill the
tank with sand conforming to ISPWC Division 800.
The area shall be finished graded to present a pleasing appearance with slopes rounded and
flattened to blend naturally with the adjacent topography.
Four (4) inches of topsoil conforming to SSP 25050 and hydro-seed shall be placed on graded
areas.
Backfill, topsoil and hydro-seed are considered incidental to this item.
Measurement and Payment: Abandon Existing Septic System will be measured per each and shall
include all labor, equipment and material necessary for the completion of the bid item. The
accepted quantity of Abandon Existing Septic System will be paid at the contract unit price for the
item listed below.
Payment for this item will be made under:
SSP29800
60. SSP 70015
Abandon Existing Septic System ..............................................Per Each
Concrete Canal Lining
Description: This item shall consist of furnishing new concrete canal lining on the canal banks at
the location and grades shown on the plans or as directed by the Engineer.
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Materials: Concrete for concrete canal lining shall be Class 4000B meeting the requirements of
Division 700 of the ISPWC. Welded wire fabric for reinforcing shall conform to the requirements of
Section 708.02 - Reinforcing Steel of the ITD Standard Specifications for Highway Construction.
Pre-formed expansion joint fillers shall conform to AASHTO M 213.
Workmanship: Existing concrete canal lining shall be saw cut and removed to the lines shown on
the plans. The canal bank and aggregate base on which the concrete canal lining is to be placed
shall be graded to the lines shown on the plans and compacted in accordance with ISPWC Division
800 Aggregates and Division 700 Concrete.
Construction joints shall be constructed at 8-foot maximum spacing in any direction. Joints shall
be formed by edging a ½" radius at each edge of poured concrete at the joint, or by scoring to a
depth of 1". Scored joints shall be formed by a tool which will leave rounded corners and destroy
aggregate interlock to a depth of 1-inch.
All joints where canal lining matches existing lining shall be sealed by scoring a ½" wide by 1" deep
groove into the new concrete canal lining, installing 5/8" backer rod, and sealing the joint with a
silicone sealant. Silicone sealant shall be Dow Corning 902, Watson Bowman silicone sealant, or
approved equal.
Adjacent abutment piling and abutment and wingwall concrete shall be in place prior to
placement of the canal lining in order to protect the integrity of the new canal lining.
Measurement and Payment: This item shall consist of furnishing all labor, material, and equipment
necessary to construct new concrete canal lining on the canal banks at the location and grades
shown on the plans or as directed by ACHD
Payment for this item will be made under:
SSP 70015
Concrete Canal Lining .......................................................... Per Square Yard
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